valuepenguin.com

Checked 22 October 2026, 11:20 UTC · via 8.8.8.8
!Passed with warnings
28 passed 1 warning 0 failed 2 info

Registration

info

.com generic · MarkMonitor Inc. · expires 2029-06-03

Found

TLD
.com (generic)
ICANN policies apply
yes
Registrar
MarkMonitor Inc.
Registered
3 June 2013
Last changed
18 November 2021
Expires
3 June 2029
Status
client delete prohibited, client transfer prohibited, client update prohibited
Registry nameservers
ns-1175.awsdns-18.org, ns-123.awsdns-15.com, ns-1714.awsdns-22.co.uk, ns-971.awsdns-57.net
RDAP server
https://rdap.verisign.com/com/v1/

Checks

  • i
    .com is a generic TLD (gTLD)
    Generic TLD under an ICANN registry agreement: ICANN-accredited registrars, UDRP and RDAP apply.
    #1
  • ✓ TLD delegated and signed #2
    .com is delegated in the root zone and DNSSEC-signed.
  • ✓ Expires on 2029-06-03 #3
    The registration is valid until 2029-06-03 (955 days).
  • ✓ Transfer locked #4
    Registry status: client delete prohibited, client transfer prohibited, client update prohibited.
  • ✓ Registry and delegation match #5
    The nameservers registered at the registry are the ones published in DNS.

Delegation

info

ns-1175.awsdns-18.org, ns-123.awsdns-15.com, ns-1714.awsdns-22.co.uk, ns-971.awsdns-57.net

Found

Parent zone
com
Delegation from
a.gtld-servers.net (192.5.6.30)
NS at the parent
ns-1175.awsdns-18.org, ns-123.awsdns-15.com, ns-1714.awsdns-22.co.uk, ns-971.awsdns-57.net
NS in the zone
ns-1175.awsdns-18.org, ns-123.awsdns-15.com, ns-1714.awsdns-22.co.uk, ns-971.awsdns-57.net
NameserverAddressesNetwork (AS)Glue
ns-1175.awsdns-18.org205.251.196.151 2600:9000:5304:9700::1AS16509 AMAZON-02 - Amazon.com, Inc., US AS16509 AMAZON-02 - Amazon.com, Inc., US-
ns-123.awsdns-15.com205.251.192.123 2600:9000:5300:7b00::1AS16509 AMAZON-02 - Amazon.com, Inc., US AS16509 AMAZON-02 - Amazon.com, Inc., US205.251.192.123 2600:9000:5300:7b00::1
ns-1714.awsdns-22.co.uk205.251.198.178 2600:9000:5306:b200::1AS16509 AMAZON-02 - Amazon.com, Inc., US AS16509 AMAZON-02 - Amazon.com, Inc., US-
ns-971.awsdns-57.net205.251.195.203 2600:9000:5303:cb00::1AS16509 AMAZON-02 - Amazon.com, Inc., US AS16509 AMAZON-02 - Amazon.com, Inc., US-

Checks

  • ✓ 4 nameservers #6
    Delegated to ns-1175.awsdns-18.org, ns-123.awsdns-15.com, ns-1714.awsdns-22.co.uk, ns-971.awsdns-57.net.
  • ✓ Parent and zone agree #7
    The parent delegation and the zone's NS records list the same nameservers.
  • ✓ No glue needed #8
    All nameservers are outside the zone, so no glue records are needed.
  • ✓ All names resolve #9
    Every nameserver name has an address and is not an alias.
  • ✓ Nameservers in different networks #10
    The nameservers are spread over 4 IPv4 /24s and 4 IPv6 /48s.
  • i
    All nameservers in one AS
    All nameserver addresses are announced by one network operator (AS16509 (AMAZON-02 - Amazon.com, Inc., US): 8 addresses). An outage or attack on that network affects all nameservers; large anycast providers mitigate this, but a secondary DNS provider adds independence.
    #11
  • ✓ Nameserver names under 4 TLDs #12
    Nameserver names use the TLDs .com, .net, .org, .uk.
  • ✓ All reachable over IPv6 #13
    Every nameserver has an IPv6 address.

Nameservers

pass

8 of 8 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns-1175.awsdns-18.org 205.251.196.151NOERROR, 4 ms, authoritativenoyes / yesrefused-
ns-1175.awsdns-18.org 2600:9000:5304:9700::1NOERROR, 4 ms, authoritativenoyes / yesrefused-
ns-123.awsdns-15.com 205.251.192.123NOERROR, 9 ms, authoritativenoyes / yesrefused-
ns-123.awsdns-15.com 2600:9000:5300:7b00::1NOERROR, 9 ms, authoritativenoyes / yesrefused-
ns-1714.awsdns-22.co.uk 205.251.198.178NOERROR, 9 ms, authoritativenoyes / yesrefused-
ns-1714.awsdns-22.co.uk 2600:9000:5306:b200::1NOERROR, 9 ms, authoritativenoyes / yesrefused-
ns-971.awsdns-57.net 205.251.195.203NOERROR, 4 ms, authoritativenoyes / yesrefused-
ns-971.awsdns-57.net 2600:9000:5303:cb00::1NOERROR, 4 ms, authoritativenoyes / yesrefused-

Checks

  • ✓ All respond #14
    All 8 nameserver addresses answered.
  • ✓ All authoritative #15
    Every responding nameserver answers authoritatively for the zone.
  • ✓ No recursion #16
    The nameservers do not answer recursive queries for other domains.
  • ✓ No version disclosed #17
    The nameservers don't reveal their software version.
  • ✓ Zone transfers refused #18
    No nameserver allows a zone transfer to the public.
  • ✓ TCP supported #19
    All nameservers answer over TCP.
  • ✓ EDNS supported #20
    All nameservers support EDNS(0).
  • ✓ Public addresses #21
    All nameserver addresses are publicly routable.

SOA

pass

serial 1 · primary ns-1714.awsdns-22.co.uk

Found

Primary (MNAME)
ns-1714.awsdns-22.co.uk
Contact (RNAME)
awsdns-hostmaster.amazon.com
Serial
1
Refresh / retry
7200 s / 900 s
Expire
1209600 s
Negative TTL
86400 s

Serial per nameserver

NameserverSerial
ns-1175.awsdns-18.org (205.251.196.151)1
ns-1175.awsdns-18.org (2600:9000:5304:9700::1)1
ns-123.awsdns-15.com (205.251.192.123)1
ns-123.awsdns-15.com (2600:9000:5300:7b00::1)1
ns-1714.awsdns-22.co.uk (205.251.198.178)1
ns-1714.awsdns-22.co.uk (2600:9000:5306:b200::1)1
ns-971.awsdns-57.net (205.251.195.203)1
ns-971.awsdns-57.net (2600:9000:5303:cb00::1)1

Checks

  • ✓ Serial 1 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 2h, retry 15m, expire 14d, negative TTL 1d.
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns-1714.awsdns-22.co.uk is one of the listed nameservers.
  • ✓ Contact awsdns-hostmaster@amazon.com #25
    The SOA RNAME awsdns-hostmaster.amazon.com means awsdns-hostmaster@amazon.com.
  • ✓ Counter serial #26
    The serial 1 is a plain counter.

DNSSEC

warn

Not signed

Found

Validated by resolver
no

Checks

  • !
    Not signed
    The zone is not signed with DNSSEC, so answers can be spoofed. Enable DNSSEC at your DNS provider and publish the DS record at your registrar.
    #27

Records

pass

29 records at the apex

Found

Read from
205.251.196.151:53
TypeValueTTL
SOAns-1714.awsdns-22.co.uk. awsdns-hostmaster.amazon.com. 1 7200 900 1209600 86400900
NSns-1175.awsdns-18.org.172800
NSns-123.awsdns-15.com.172800
NSns-1714.awsdns-22.co.uk.172800
NSns-971.awsdns-57.net.172800
A104.18.18.105300
A104.18.19.105300
MX1 aspmx.l.google.com.300
MX10 alt3.aspmx.l.google.com.300
MX10 alt4.aspmx.l.google.com.300
MX5 alt1.aspmx.l.google.com.300
MX5 alt2.aspmx.l.google.com.300
TXT"activeprospect-domain-verification=MbUOXycf1Caz5TSqeDIg/g=="300
TXT"ahrefs-site-verification_7e099543e9db70493f1b8becc9971cd34b7c532050837ef01f80712f3a7509df"300
TXT"ahrefs-site-verification_9b7ea38ab5fbcf073c2cc77926f72cc2c1d36ee0c61fcec30a51e7c6fcd1aebe"300
TXT"atlassian-domain-verification=J2ZzIYPte0SQuNMU8hFNJXLAGlijWpRZWE4LlwkwyIIEJWEv/8C9AE2OS/OXFXQ4"300
TXT"google-site-verification=_iXutlAm8lK_GUKYYOTDkKyLppDd6JcmCjZACj7PnOs"300
TXT"google-site-verification=lVM2C4uTYEJIy0KaAVSyM29WlgT4ifbAtAzeFbSWYGc"300
TXT"spycloud-domain-verification=95457eb7-7f12-4038-93e0-0f83198865f2"300
TXT"v=spf1 include:_spf.google.com include:mailgun.org include:servers.mcsv.net ~all"300
CAA0 issue "amazon.com"300
CAA0 issue "amazonaws.com"300
CAA0 issue "amazontrust.com"300
CAA0 issue "awstrust.com"300
CAA0 issue "digicert.com"300
CAA0 issue "letsencrypt.org"300
CAA0 issuewild "amazon.com"300
CAA0 issuewild "digicert.com"300
CAA0 issuewild "letsencrypt.org"300

Checks

  • ✓ TTLs within range #32
    TTLs: A 5m, MX 5m, NS 2d.
  • ✓ No CNAME at the apex #33
    The zone apex has no CNAME record.
  • ✓ No wildcard #34
    Names that don't exist return NXDOMAIN.
  • ✓ CAA restricts issuance #35
    Certificates may be issued by: amazon.com, amazonaws.com, amazontrust.com, awstrust.com, digicert.com, letsencrypt.org.